Capacity Assessment of Corroded Reinforced Concrete Structures

A special issue of Buildings (ISSN 2075-5309). This special issue belongs to the section "Building Structures".

Deadline for manuscript submissions: 20 August 2025 | Viewed by 1365

Special Issue Editors


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Guest Editor
Laboratory of Technology and Strength of Materials, Department of Mechanical Engineering and Aeronautics, University of Patras, Patras, Greece
Interests: mechanical behavior of materials; steel corrosion; failure analysis; corrosion protection; fatigue and fracture mechanics of metals
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Guest Editor
Laboratory of Technology and Strength of Materials, Department of Mechanical Engineering and Aeronautics, University of Patras, Patras, Greece
Interests: finite element analysis; corrosion engineering; structural dynamics; steel structures; fatigue and fracture mechanics of steel reinforcement

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Guest Editor
Laboratory of Technology and Strength of Materials, Department of Mechanical Engineering and Aeronautics, University of Patras, Patras, Greece
Interests: degradation of reinforced concrete; marine corrosion; surface engineering; corrosion protection; finite element modelling

Special Issue Information

Dear Colleagues,

It is widely accepted that the occurrence of corrosive phenomena on steel reinforcement is closely linked to the degradation of structural integrity and durability of Reinforced Concrete (RC) buildings. However, the assessment of structural capacity of corroded RC elements consists of a complex task in the engineering field, since it depends on several variable factors, such as the chloride or CO2 concentration, the temperature and humidity conditions, the porosity and mixture of concrete, the chemical composition of steel reinforcement, the type of corrosion (uniform of pitting), the residual cross-section of corroded rebars, the respective seismic building regulations of different countries, etc.

Taking into account the negative consequences of corrosion on the durability of RC structures, as well as the high financial costs for rehabilitation and repair of the aged structures, the need to enhance the existing design codes considering the corrosive factor is raised. In this context, this Special Issue of Buildings aims to strengthen the scientific progress that has already been achieved both by adding evidence upon the assessment of the mechanical behavior of corroded steel reinforcement, the degradation of concrete durability, the loss of steel–concrete bonds and on the other hand, by proposing methods of dealing with the structural degradation and proposals for the restoration of strengthening of damaged structural elements.

Topics to be covered in this Special Issue include:

  • Monitoring of corrosion level via surface concrete cracking;
  • Measurement of critical chloride concentration, in the laboratory and on site;
  • Assessment of corroded RC structures;
  • Modelling the corrosive factor in RC elements;
  • Coatings to enhance durability of structures exposed to chloride-induced corrosion;
  • Bond-slip degradation due to corrosion;
  • Case studies and applications.

Prof. Dr. Charis Apostolopoulos
Dr. Konstantinos Koulouris
Dr. Maria Basdeki
Guest Editors

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Keywords

  • steel corrosion
  • concrete durability
  • corroded RC structures
  • mechanical properties of rebar
  • steel–concrete bond loss
  • pitting corrosion
  • assessment of bearing capacity

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Published Papers (1 paper)

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Research

21 pages, 7494 KiB  
Article
Experimental Study on the Dynamic Response of Different Grades of Corroded Steel Reinforcement
by Maria Basdeki, Konstantinos Koulouris and Charis Apostolopoulos
Buildings 2024, 14(9), 2598; https://doi.org/10.3390/buildings14092598 - 23 Aug 2024
Viewed by 686
Abstract
The mechanical behavior of corroded steel reinforcement under dynamic loadings is crucial for the entire structural response of reinforced concrete elements located in seismic regions. Taking into account the need to assess the structural integrity of existing building stock and the fact that [...] Read more.
The mechanical behavior of corroded steel reinforcement under dynamic loadings is crucial for the entire structural response of reinforced concrete elements located in seismic regions. Taking into account the need to assess the structural integrity of existing building stock and the fact that the majority of the existing RC structures in Greece are constructed with the use of steel grades of S400 (equivalent to BSt 420s) and Tempcore B500c, the present study examines the dynamic behavior of rebars of different grades under low cycle fatigue (LCF) at a constant strain amplitude of ±2.5% and compares their performance through a quality material index. In the margin of the current research, the study also included two different grades of hybrid rebars, Tempcore B450 and dual-phase F (DPF). The outcomes demonstrated that single-phase S400 steel underwent mild degradation in its ductility, whereas its bearing capacity was significantly decreased due to corrosion. In contrast, B500c illustrated its superiority in terms of strength, yet recorded extremely limited service life, even in uncorroded conditions, raising questions about its reliability and the structural integrity of existing building stock. However, in corroded conditions, even if B500c corroded rebars showed higher mass loss values than the other examined grades, the degradation of their mechanical behavior due to corrosion was found to be minimal. Furthermore, dual-phase DPF rebars, with their homogeneous microstructure, appeared particularly promising with respect to Tempcore B450 if one considers the span of its service life compared to the extent of corrosion damage. Full article
(This article belongs to the Special Issue Capacity Assessment of Corroded Reinforced Concrete Structures)
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